90° Swivel Fittings

Q: How do I install and clock an aluminum swivel hose fitting without twisting the hose?

Step 1: Depressurize the system. Shut off the vehicle, release all residual pressure and completely drain the fluid line before disconnecting or installing any swivel hose fitting . Step 2: Confirm hose compatibility. Identify whether the hose uses a CPE liner or PTFE liner . Match CPE hose with a CPE hose end and PTFE hose with a PTFE specific fitting. These fitting families are not interchangeable. Step 3: Cut the hose square. Use the correct hose cutting tool to create a clean, straight cut. Remove loose braid, debris and damaged liner material before assembly. Step 4: Install the correct fitting components. Assemble the socket and nipple specified for a CPE hose end. For a PTFE hose end, install the required ferrule or olive according to the product instructions. Step 5: Tighten and adjust the outlet angle. Hold the fitting body with the proper wrench while tightening the connection. Clock the swivel outlet within its intended adjustment range until the hose follows the planned route without twisting or tension. Step 6: Check the hose routing. Keep the completed line away from exhaust heat, sharp edges, abrasive surfaces and moving components. Make sure the hose does not exceed its specified minimum bend radius . Step 7: Pressure test the connection. Pressurize the system gradually and inspect every fitting for leakage or seepage. Check all connections again after the first operating heat cycle. Safety Note: A swivel hose end is designed for assembly and angle adjustment. It must not be used as a continuously rotating union .

Q: What is the difference between 6061 T6 aluminum, stainless steel and steel 90 degree fittings?

6061 T6 aluminum is lightweight, corrosion resistant and well suited to performance automotive plumbing. Stainless steel generally offers greater strength and corrosion resistance in harsh environments, but it is heavier and usually more expensive. Plated steel is strong and economical, although it is heavier and depends on its coating for corrosion protection. Material alone does not prove fuel or fluid compatibility. The hose liner, ferrule, seals, fluid, pressure and temperature must also be verified.

Choose 90 Degree Swivel Fittings by Hose Type First

Use 90 degree swivel fittings when a straight hose end would force a sharp bend, twist the hose or crowd a fuel rail, regulator, pump, tank, oil cooler or transmission line. The angled outlet helps create cleaner fuel line routing in tight engine bays, while the swivel section lets you clock the hose direction during assembly. Before selecting any AN hose fittings, match the hose construction, AN size, connection type, fluid, pressure, temperature and available space.

AN Size Quick Reference for 90 Degree Hose Ends
AN Size	Nominal Hose or Tube Size	Male AN Thread	Common Automotive Examples
4AN	1/4 inch	7/16 inch 20 UNF	Oil feed, pressure gauge and small vacuum lines
6AN	3/8 inch	9/16 inch 18 UNF	EFI fuel feed and return lines
8AN	1/2 inch	3/4 inch 16 UNF	Higher flow fuel feed or return lines
10AN	5/8 inch	7/8 inch 14 UNF	Large return, vent and turbo oil drain lines
12AN	3/4 inch	1 1/16 inch 12 UNF	High flow oil, coolant or custom fluid routing
16AN	1 inch	1 5/16 inch 12 UNF	Coolant and large crankcase vent lines
20AN	1 1/4 inch	1 5/8 inch 12 UNF	Large coolant or custom high flow systems

AN size is based on nominal tube outside diameter in sixteenths of an inch. Actual hose inside diameter can vary by hose family, so confirm the selected hose specifications instead of choosing by the inch label alone. The application examples are routing starting points, not vehicle fitment rules.

Compatibility comes before AN size. A cutter or socket style CPE 90 degree hose end must be used with the matching CPE lined hose. Stainless braid and nylon braid describe the outer cover, not the inner liner. A PTFE fuel hose requires a PTFE specific hose end with the correct ferrule or olive. Installing a CPE hose end on PTFE hose can create a leak and a serious fuel safety hazard.

For a matching CPE system, compare the Evil Energy 90 degree AN hose end and pair it with the correct size of CPE fuel lines. If your hose has a PTFE inner liner, shop PTFE hose end fittings instead.

Match AN Size, Thread and Routing Space Before You Buy

Evil Energy offers 90 degree swivel fittings in common performance plumbing sizes, including 4AN, 6AN, 8AN, 10AN, 12AN, 16AN and 20AN on selected products. The featured single 90 degree hose end uses CNC machined 6061 T6 anodized aluminum, a 37 degree AN flare and a swivel design for easier alignment. Pressure and temperature ratings vary across individual hose ends and kits, so verify the exact product, hose and fluid specification before ordering.

A 90 degree body saves space by replacing a forced hose bend close to the port, but it does not override the hose manufacturer’s minimum bend radius. Measure the available height and offset, leave room for a wrench, confirm the hose exit clearance and route the line away from exhaust heat, sharp edges and moving parts. This check helps prevent kinks, abrasion, restricted flow and an expensive second order.

Clock the Swivel, Then Seal the 37 Degree AN Flare Correctly

A swivel hose fitting is most useful when the final outlet direction cannot be set in advance or when a fixed fitting would twist the hose during tightening. A fixed hose end is usually sufficient when the route is open, the fitting can be preclocked and the hose remains relaxed. Use the swivel for assembly and alignment only; it is not a continuously rotating union.

Confirm the hose family, AN size, thread, fluid and operating limits before cutting the line.
Inspect the 37 degree flare seat and keep it clean. The AN connection seals at the cone, not at the threads, so do not apply PTFE tape or thread sealant to AN flare threads. If the port is actually NPT, select the correct AN to NPT adapters and apply only the manufacturer approved sealant to the NPT end.
Cut the hose square, install the correct socket, nipple and ferrule components for that hose family, then hold the fitting body with the proper wrench while tightening.
Set the final outlet angle without leaving torsion in the hose. Pressure test the completed system, inspect every joint for seepage and recheck after the first heat cycle.

Need help identifying threads before ordering? Use the Evil Energy AN fitting size and thread guide.

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FAQs about 90° Swivel Fittings

How do I choose the correct 90 degree swivel fitting for my AN hose?

Start with the hose construction, not the color or braid. Confirm whether the inner liner is CPE, PTFE or another hose type, then match the fitting family, AN size, 37 degree flare thread, fluid, pressure, temperature and available routing space. Choose a swivel design when final clocking is needed to prevent hose twist. Use a fixed hose end when the route is open and the hose can be assembled without torsion.

Can a CPE 90 degree hose end be used with PTFE fuel hose?

No. A CPE cutter or socket style hose end is not a substitute for a PTFE hose end. PTFE fuel hose requires a PTFE specific fitting with the correctly sized ferrule or olive. Stainless braid and nylon braid describe the hose cover, not the inner liner. Mixing the hose and fitting families can cause poor retention, fuel leakage and a fire hazard.

Do AN hose fittings need PTFE tape or thread sealant?

Do not use PTFE tape or thread sealant on the AN flare side. An AN connection seals at the 37 degree cone, not at the threads. Keep the flare clean and undamaged, then tighten it with the method specified for the fitting. If an adapter has an NPT pipe thread on the other end, use only a fluid compatible, manufacturer approved sealant on that NPT end.

How do I install and clock an aluminum swivel hose fitting without twisting the hose?

Step 1: Depressurize the system. Shut off the vehicle, release all residual pressure and completely drain the fluid line before disconnecting or installing any swivel hose fitting.
Step 2: Confirm hose compatibility. Identify whether the hose uses a CPE liner or PTFE liner. Match CPE hose with a CPE hose end and PTFE hose with a PTFE specific fitting. These fitting families are not interchangeable.
Step 3: Cut the hose square. Use the correct hose cutting tool to create a clean, straight cut. Remove loose braid, debris and damaged liner material before assembly.
Step 4: Install the correct fitting components. Assemble the socket and nipple specified for a CPE hose end. For a PTFE hose end, install the required ferrule or olive according to the product instructions.
Step 5: Tighten and adjust the outlet angle. Hold the fitting body with the proper wrench while tightening the connection. Clock the swivel outlet within its intended adjustment range until the hose follows the planned route without twisting or tension.
Step 6: Check the hose routing. Keep the completed line away from exhaust heat, sharp edges, abrasive surfaces and moving components. Make sure the hose does not exceed its specified minimum bend radius.
Step 7: Pressure test the connection. Pressurize the system gradually and inspect every fitting for leakage or seepage. Check all connections again after the first operating heat cycle.

Safety Note: A swivel hose end is designed for assembly and angle adjustment. It must not be used as a continuously rotating union.

What is the difference between 6061 T6 aluminum, stainless steel and steel 90 degree fittings?

6061 T6 aluminumis lightweight, corrosion resistant and well suited to performance automotive plumbing. Stainless steel generally offers greater strength and corrosion resistance in harsh environments, but it is heavier and usually more expensive. Plated steel is strong and economical, although it is heavier and depends on its coating for corrosion protection.

Material alone does not prove fuel or fluid compatibility. The hose liner, ferrule, seals, fluid, pressure and temperature must also be verified.

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90° Swivel Fittings

Choose 90 Degree Swivel Fittings by Hose Type First

Match AN Size, Thread and Routing Space Before You Buy

Clock the Swivel, Then Seal the 37 Degree AN Flare Correctly

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90° Swivel Fittings

Choose 90 Degree Swivel Fittings by Hose Type First

Match AN Size, Thread and Routing Space Before You Buy

Clock the Swivel, Then Seal the 37 Degree AN Flare Correctly

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